Commit fc1bfdfd authored by Richard Henderson's avatar Richard Henderson Committed by Richard Henderson
Browse files

tcg/arm: Expand epilogue inline 



It is, after all, just two instructions.

Profiling on a cortex-a15, using -d nochain to increase the number
of exit_tb that are executed, shows a minor improvement of 0.5%.

Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent d6fa50f5

tcg/arm/tcg-target.inc.c

+2 −10
Original line number Diff line number Diff line
@@ -1745,7 +1745,6 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is64) 
#endif

}



static tcg_insn_unit *tb_ret_addr;

static void tcg_out_epilogue(TCGContext *s);



static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
@@ -1756,14 +1755,8 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, 


    switch (opc) {

    case INDEX_op_exit_tb:

        /* Reuse the zeroing that exists for goto_ptr.  */

        a0 = args[0];

        if (a0 == 0) {

            tcg_out_goto(s, COND_AL, s->code_gen_epilogue);

        } else {

            tcg_out_movi32(s, COND_AL, TCG_REG_R0, args[0]);

            tcg_out_goto(s, COND_AL, tb_ret_addr);

        }

        tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R0, args[0]);

        tcg_out_epilogue(s);

        break;

    case INDEX_op_goto_tb:

        {
@@ -2309,7 +2302,6 @@ static void tcg_target_qemu_prologue(TCGContext *s) 
     */

    s->code_gen_epilogue = s->code_ptr;

    tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R0, 0);

    tb_ret_addr = s->code_ptr;

    tcg_out_epilogue(s);

}